Herbert



I(No Model.)

H. Ov. ROGKWELL.

ELECTRIC HEATER..

No. 566,341. Patented Aug. '25, 1896.

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UNITED STATES PATENT OFFICE.

HERBERT O. RO-OKVELL, OE ST. LOUIS, MISSOURI, ASSIGNOR OF lWVO-THIRDS TO VILLIAM HAND AND GEORGE D. ROSENTHAIJ, OF SAME PLACE.

ELECTRIC HEATER.

SPECIFICATION forming part of Letters Patent No. 566,341, dated August 25, 1896.

Application filed February 8, 1896. Serial No. 578,518. (No model.)

' T0 all whom t may concern.-

Be it known that I, HERBERT O. ROCK- WELL, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in Electric IIeaters, of which the following is a full, clear, and exact description, referencev being had to the accompanying drawings, forming a part hereof.

My invention has relation to improvements in electric heaters; and it consists in the novel arrangement and combination of parts more fully set forth in the specification, and pointed out in the claims.

In the drawings, Figure 1 is a front elevation of my heater with one-half of the casing removed. Fig. 2is a section on line ma; of Fig. 1 with the entire casing, however, in place. Fig. 3 is an end view of the body portion with one of the cap-pieces removed, and Fig. 4 is a plan of one of the cap-pieces.

The object of my invention is to construct an electric heater which will be simple, compact, present a maximum amount of heatingsurface, one whose parts can be readily assembled or taken apart, and one which presents further and other advantages to be now particularly set forth in detail.

The device may be described as follows:

Referring to the drawings, 1 represents the body portion, about which the resistance coil or wire is wrapped, said body portion being preferably in the form of an oblong plate of fire-clay, slate, or the like. Disposed transversely to the general length of the plate and on each face thereof are a series of ribs 2, having each a series of depressions 3, the bottoms of which are raised a suitable distance above the surface of the face of the plate to allow all sides of the resistance coil or wire to be exposed. The narrow ends of the plate are forked, a spacel 4 being thus left between the opposite members 5 of the said forked ends, said space 4 permitting the free wrapping of the wire without interfering with the terminal cap-pieces 6, to which the metallic radiating-casing 7 is secured. The cap-pieces G are each provided with a terminal open notchor depression 8 and a closed socket or depression 9 at a suitable distance from the lower edge of the cap-piece for the reception of the respective members 5 of the forked ends of the plate, the cap-pieces being simply passed over the members 5, as best seen in Fig. 1. Along each of the side walls of the cap-pieces and approximately about the middle of the length of the cap-pieces are cut away suitable depressions or recesses 10 for the reception of the lugs 1l, forming a part of each half of the perforated lcasing or covering 7, the respective halves of the casing being subsequently secured toone another by bolts 12 passed through the lugs 13 of said halves.

The casing is provided with legs 14, eX- tending below the lower edges of the cappieces 6, whereby the heater is raised above the Hoor, and thus allowing the air to freely circulate about the heated resistance-coil. As bestseen in Fig. 1, the depressions 3 are disposed in diagonal alinement, whereby the wire supported within them can be wound about the plate lengthwise, one end of the coil starting at the binding-post 15, thence being wrapped as already indicated, the free end thence being passed from the diagonally opposite end of the plate through a suitable opening 16 made in the body of the plate parallel to the edge of the plate, whence the wire emerges and is then secured by thebinding-post 17.

In taking the device apart the respective halves of the metallic casing are first separated. Then the cap-pieces are pulled off from the ends of the plate 1. The parts are j ust as readily reassembled, and there is never any occasion to disturb the coil wound about the plate 1. The resistance-wire is preferably in the shape of a spiral coil, so that a maximum quantity can be Wound within a limited space.

Having described my invention, what I claim is* 1. In an electric heater, a suitable plate or body portion, forked ends forming a part of the same, cap-pieces adapted to be received by said forked ends, and a suitable resistance-coil carried by the plate, said coil being wrapped aboutthe body of the plate, and the successive windings or wraps of the coil passing through the space included between the IOO forked ends and the adjacent surfaces of the body of the plate and cap-pieces, substantially as set forth.

2. In an electric heater, a suitable plate or body portion, cap-pieces carried at opposite ends of the same, a suitable space or opening being formed between the body of thc plate and the adjacent side of cach cappiece, a suitable resistance-coil carried by the plate, said coil being wrapped about the body portion of the plate and the successive windings or wraps of the coilpassing through the space foi-ined between the plate and cap-pieces carried thereby, and suitable means for separating the successive windings from each other, substantially as set forth.

3. In an electric heater, a suitable plate or body portion, adapted to have a resistancecoil Wrapped about the saine, a cap-piece at cach end of the plate, a forked connection between each cap-piece and plate, a suitable space being formed between each cap-piece and the plate for the free passage of the windings of the coil carried by the plate, suitable recesses forined along the sides of the cappieces, and a sectional casing having inner lugs adapted to enter said recesses, whereby the casingis secured directly to the cap-pieces, substantially as set forth.

4. In an electric heater, a suitable plate or body portion, adapted to support a resistanceeoil, a detachable cap-piece at each end of the plate, a forked connection between each cap piece and plate, a suitable space being formed between cach cap-piece and plate by reason of the forked connection, for the free passage of the windings of the coil carried by and disposed about the plate, suitable recesses being formed along the sides of the detachable cap-pieces, a sectional casing having inner lugs adapted to enter said recesses whereby the casing is secured directly to the cappieces, suitable supports or legs for the casing, the ends of the resist-ance coil being adapted to be connected with a suitable source of electrical energy, and means for uniting or securing the respective sections of the casing, substantially as set forth.

5. In an electric heater, a suitable plate or body portion, forked ends forinin g part of the saine, cap-pieces having suitable notches or depressions whereby the same may be passed over the forked ends of the plate to a suit able distance, suitable recesses formed. along the sides of the cap-pieces, a sectional casin g having inner lugs adapted to enter said rccesses whereby the easing is secured directly to the cap-pieces, legs forming a part of the easing, means for uniting the sections of the casing, a suitable resistancecoil adapted to be carried bythe plate and wound about the saine, the ends of said coil being adapted to be connected toa suitable source of electrical energy, substantially as set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

HERBERT O. ROCKWELL.

Vitnesses z NVM. HAND, ALFRED A. MATHEY. 

